Catalytic urea hydrolysis in the selective catalytic reduction of NO x: catalyst screening and kinetics on anatase TiO 2 and ZrO 2

…, M Elsener, T Schildhauer, O Kröcher

Index: Bernhard, Andreas M.; Peitz, Daniel; Elsener, Martin; Schildhauer, Tilman; Kroecher, Oliver Catalysis Science and Technology, 2013 , vol. 3, # 4 p. 942 - 951

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Citation Number: 17

Abstract

The catalytic hydrolysis of urea was investigated under conditions relevant for the selective catalytic reduction of NOx (urea-SCR). The hydrolysis activities of the tested catalysts coated on cordierite monoliths were in the order ZrO2> TiO2> Al2O3> H-ZSM-5> SiO2. A comparison with isocyanic acid (HNCO) hydrolysis on the same catalysts showed that urea decomposition was much slower than HNCO hydrolysis; hence, catalytic urea thermolysis ...